The brown haze of photochemical smog is largely attributable to:

Question

The brown haze of photochemical smog is largely attributable to: (A)  NO  (B)  NO2  (C)  CH3 underset overset||OCOONO2 (D)  CH2=CHCH=O

Tardigrade Admin · Accepted Answer

Photochemical smog is initiated by the photochemical dissociation of

N O_{2}

and the resulting secondary reactions involving unsaturated hydrocarbons, other organic compounds and free radicals, leading to the formation of organic peroxides and ozone,

N O_{2} (g) UV light NO (g) + [O]]

O_{2} (g) + [O] \to O_{3} (g)

Hydrocarbons

+ O_{3}, O_{2}, O, N O_{2}

, NO :
Peroxides, peroxyacetyl nitrate, formaldehyde, ozone aldehyde, acrolein etc. (oxidized hydrocarbons)
These oxidized hydrocarbons and ozone in the presence of humidity cause photochemical smog, which dissipates at night.

Q. The brown haze of photochemical smog is largely attributable to:

$NO$

$N O_{2}$

$C H_{3} O ∣∣ C OON O_{2}$

$C H_{2} = C H C H = O$

Q. The brown haze of photochemical smog is largely attributable to:

NO

NO2​

CH3​O∣∣C​OONO2​

CH2​=CHCH=O

$NO$

$N O_{2}$

$C H_{3} O ∣∣ C OON O_{2}$

$C H_{2} = C H C H = O$